Heat sink device



FIG. 1 is an isometric view of a heat sink device showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear elevation view being a mirror image of that shown;

FIG. 4 is a right side elevation view thereof, the left side elevation view being a mirror image of that shown; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a heat sink device, as shown and described. 